Celestia, Equestrial Princess

When Celestia enters the battlefield, you may
search your library for an Element of Harmony
card, reveal it and put it into your hand. Then
shuffle your library.
Flying, Vigilance
As long as Celestia is in your graveyard, you may
pay {2}{w/u}{w/u} and exile her. If you do, search your library for an Element of Harmony card, reveal it
and put it into your hand.
Then shuffle your library